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简介：ThebasaltterrainoftheNeogeneHuangguoshanand.GuiwuFormationsofeasternAnhuiontheeastsideoftheTancheng-LujiangfaultbeltisoneofafewCenozoicbasaltterrainsineasternChinaforwhichdetailedgeochemicalstudyhasnotbeenconducted.Thispaperreportstheabundancesofmajorelementsandmorethan20traceelements(includingREE)of22samplesandtheNd,SrandPbisotopiccompositionsof11samplesfromtheeasternAnhuibasaltterrain,thusmoreorlesssystematicallyrevealingthegeochemicalcharacteristicsofthiscontinentalbasaltsuite.Thepaperdiscussestheoriginofthebasaltsuiteandthecharacterandprocessofitsmantlesource.ThebasaltsuitewasderivedfromaheterogeneouscontinentallithosphericmantlewithendmemberscharacteristicoftheEMI-typeoceanicbasaltmantle,whichwasaffectedbymantlemetasomatism(orenrichmentoftraceelements)andwascharacterizedbyamulti-stageevolutionunderopenconditions.

简介：Biomarkerisanimportanttoolinthestudyofmarineorganicgeochemistry.Itsdevelopmentandapplicationmakesitpossibletoelucidatetheprocessandmechanismoftheorganicmatterintheocean.Hydrocarbonsarethemostusefulmolecularmarkers.Theyareusedastracersinmanyaspects,suchassourceindication;thedegradationoforganicmatter;diagensisprocess;environmentalpollutionandpaleooceanicstudy,etc.Theyarestudiedintheestuaries,coastalareaanddeepseatogivetheknowledgeofmarineorganicgeochemistry.Thepaperdealswiththecharacteristics,developmentandapplicationofbiomarkersaswellastheiradvantagesanddisadvantages.

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简介：TheYinyanporphyrytindepositisablinddepositassociatedwithasmallgraniteporphyrystock.ThepetrologyandgeochemistryoftheYinyangraniteporphyrysuggestthatitisgeneticallyofthetransfor-mationtype,emplacedatthelatestageoffractionalcrystallizationwithinahigh-levelmagmachamber.Ore-formingfluidsarederivedpredominantlyfromthegraniticmagmaandtheyinteractwiththewallrocksintenselywhenfindingtheirwayupwardsthroughthegraniteporphyry.Fromthelowerpartoftheporphyryupwardsthefollowingalterationzonescanbedistinguished(a)slightlyalteredgraniteporphyry(withweakpotashfeldspathization),(b)protolithionite-quartzgreisenizationzone,(c)to-paz-quartzgreisenizationzone,(d)senicite-quartzsericitizationzone,and（e）silicificationzone(quartzcoreatthesurface).Tinmineralizationisrelatedtogreisenization,especiallytotopaz-quartzgreisenization.Rockandore-formingtemperaturesandoxygenfugacitiesareestimated,respectively.TherearesignificantdifferencesinmanyaspectsbetweentheYinyanporphyrytindepositandvolcan-ic-subvolcanicporphyrytindeposits.

简介：ThesoilsinSouthChinaseaIslands(SCSI)weredividedintothreetypes,nmaely,phospho-calcsoils,skeletisolsandcoasticsolonchake,whichwerederivedfrombio-clasticandstronglycalcareoussediments.Incomparisonwiththeirparentmaterials,thephospho-CalcsoilshavehighercontentsofP,ZnCu,Ba,andCd,whichtendtoincreasegraduallywithtime,andlowercontentsofMg,Ca,Sr,B,V,Pb,andMo,whichtendtodecreasebydegreeswithtime,Theabove-mentionedconstituentsinskeletisolsandcoasticsolonchaksaresimilartothoseintheirparentmaterialsexceptforPandNa,Thefactorsaffectingelementdistributionaremainlyspecialbioclimateandparentmaterial,meanwhile,resultingintheremakableinfluenceonelementdistributionthroughsoil-formingtime.

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简介：TheKuandianComplexisscarcelypreservedEarlyProterozoicvolcanicsuite,formed2.3-2.4Gaago.ItislocatedinanEarlyProterozoicmobilebeltboundedbytheArchaeanRangrimandRyonggangBlocksofthenortheasternSino-KoreanCraton.TheComplexismainlymadeupofamphibolites,gneisses,leucoleptite,leptiteandlayeredgranite.PetrologicalandgeochemicalstudiesshowthattheprotolithsoftheComplexaremainlyassoctationsofbimodalvolcanicsandanorogenicgranites.TheKuandianamphibolitesaredepletedinNb,Ta,PandTi,andenrichedinLILE,e.g.K,RbandCs,withpronounceddepletionofSrrelativetoNdandPb;La/Nbratiosarehigherthan1（1.75to5.18）.ThetraceelementpatternsoftheamphibolitesaresimilartocontinentalfloodbasaltsformedbytheGondwanabreak-up,suchasthoseinSouthKarooandTasmania,whichshowscontinentalcontamination.εNdvaluesrangingfrom0.70to1.94oftheKuandianamphibolitesandtherelationshipsbetweenNb/YbandLa/Ybsuggestthatcontaminationofbasalticmagmahappenedinthemantle,ratherthanalongtheconduit.Isotoperatiosof208Pb/204Pb,207Pb/204Pb,206Pb/204Pb,143Nd/144Ndand87Sr/86SrindicatethatthemagmawasderivedfromacontaminatedmantlesourcelikeDMMoramixtureofDMMandEM2.TheKuandianComplexhasDupalanomaly,asisthecasewithsomecontinentalbasaltsinthesouthhemisphere,e.g.inSouthKarooandTasmania.PetrochemicalmodellingproposesthattheKuandiangneiss,granite,andamphibolitecamefromthesameparentalmagma,beingproductsofstrongfractionalcrystallization.ProtolithsoftheKuandianComplexwereformedinextensionaltectonicsettingduringthetransitionfromcontinentalcrusttooceaniccrust.TheformationoftheKuandianComplexindicatesthat2.3or2.4GaagotectonicevolutionoftheSino-Koreancratonwasdifferentfromthatofotherwell-studiedPrecambriancratons,e

简介：REEgeochemicalstudiesofsurficialsedimentsamplesfromtheYellowSeaofChinahaveshown:(1)TheaveragecontentofRE2O3intheYellowSeasedimentsis175ppm,closetothatintheEastChinaSeasediments.TheREEdistributionpatternsintheYellowSeasedimentsarealsosimilartoanomalies.TheseREEcharacteristicsaretypicalofthecontinentalcrust.(2)ThecontentsofREEarecontrolledmainlybythesedimentgrainsize,i.e.,REEcontentsincreasegraduallywithdecreasingsedimentgrainsize.REEarepresentmainlyinclayminerals.Inaddition,REEcontentsarecontrolledobviouslybyheavyminerals.REEabundancesinheavymineralsaremuchgreaterthanthoseinlightminerals.(3)CorrelationanalysisshowsthatREEhaveacloserelationshipwithsiderophileelements,especiallyTi,whichhasthelargestcorrelationcoefficientrelativetoREE.TerrigenousclasticmaterialssubjectedtoweatheringandtransportaresuggestedtobethemainsourceofREEintheYellowSeasediments.

简介：Sediment-hostedgolddepositsarethemajortypeofgoldresourcesinchina,Concentratedmostlyinthetwo'TriangleRegios',theyaregenerallyhostedinfine-clasticturbidite,hydrothermalchetandmarlrangingfromcambriantoTriassicinage,structurallycontrolledbydomes,anticlinesandsecond-orderedfaults.TheyaresimilartotheCarlin-typegolddepositsinmineralassemblageandgeochemicalmarks,withanelementassociationcloselycomparabletothoseofmodernspringsandsubmarinehydrothermalsediments.Organicmattermayhaveplayedanimportantroleinmineralization.Theoresolutionmaybehydrothermallyalteredmeteoricwaterdevelopediareasoflocalgeothermalanomaly.

简介：学习的水属于温暖(T=30-50°C)，碱(pH=8.9-9.3)，低使矿物化(TDS<235mg/l)Na-HCO3或Na这样有高度的热水SiO2(多达81mg/l)满足的4-HCO3和F(多达3.9mg/l)，在东方Sikhote-Alinorogenic带的现代火山构造的恢复区域上发生。低3他集中以及N2/O2和N2/Ar比率排除深披风液体的影响。新稀土元素元素数据抑制我们水岩石相互作用发生在水来源区域的理解。水的大气的起源被从−71‰变化的稳定的同位素价值证明到−136.1‰并且从−10.8‰到−18.8‰为δ2H和δ18O分别地。REE模式反映高pH，从水岩石相互作用的resultfing和氧化条件。用Na-K和石英地温计的深含水土层温度的计算分别地显示出116.8-131.1°C和82.2-125.8°C。深差错的存在两个与反常热坡度(∼45-50K/km)定义Sikhote-Alin的热水的唯一的geochemical形状，区域，在没有现在的暴烈的活动被登记的地方。

简介：Neoarchean变形mafic岩石在更低并且中间的WutaiComplexmainly包括变形斑粝岩，角闪岩和绿泥片岩。他们能根据球粒状陨石被细分进三个组规范的REE模式。在组#1的岩石被将近扁平的REE模式(La_n/Yb_n=0.86-1.3)描绘，最低全部的REE(29-52ppm)，并且弱对积极Eu异例否定(Eu_n/Eu_n~*=0.84-1.02)，将近完全原始的披风使模式和强壮的否定Zr(Hf)正常化异例。他们在REE和痕量元素的geochemical特征类似于海洋高原拉斑玄武岩的那些，它暗示这组岩石能表示太古代的海洋的外壳的残余源于一根披风羽毛。在组#2的岩石被中等全部的REE(34-116ppm)描绘，充实LREE(La_n/b_n=1.76-4.34)球粒状陨石与弱Eu异例使REEpatterns正常化(Eu_n/Eu_n~*=0.76-1.16)，并且否定Nb，Ta，Zr(Hf)，在使正常化的原始披风的Ti异例搜寻图。REE和痕量元素特征显示他们表示从一个亚弧披风发源的弧岩浆挤metasomatized导出byslab的液体。在组#3的岩石被最高全部的REE(61-192ppm)描绘，有稍微否定的Eu异例的最强壮的LREE丰富(La_n/Yb_n=7.12-16)(Eu_n/Eu_n~*=0.81-0.95)在球粒状陨石规范的图。在原语，披风使图正常化，这些岩石被大负异常在Nb描绘，Ta，Ti，对没有Zranomalies否定。他们代表从充实的亚弧披风楔发源的弧岩浆导出inslab融化。三组岩石暗示NeoarcheanWutaiComplex的形成与披风羽毛和岛弧相互作用有关。

简介：TheHongshijinggolddeposit,whichoccursintheMiddleandLateCarboniferousvolcanicandpyroclasticrocks,isofthebrittle-ductileshearzonetypecontrolledbyariftbelt.TheHongshijinggolddepositisonecontrolledbyabrittleshearzonelocatedintheLatePaleo-zoicriftzone.Thealtered-rocktypeandquartztypeorebodiesarecontainedinthegold-bearingformation,whichconsistsofbasaltandtuffaceoussandstone.Themajormineralizingstageisat267-261Maandreiterationmineralizingstageat220-209Ma.Theoremineralsincludepy-rite,magnetite,copper,bornite,ferrohydrite,nativegold,andtheganguemineralsincludequartz,sercite,calcite,Fe-dolomite,leucoxene,anorthose,biotite,baria,cajuelite,andagustite.Thewallrockalterationassociatedwithgoldmineralizationcomprisessilicification,carbonization,pyritization,sericitizationandchloritization.Thecontentsofgoldare2.4×10-9inthegold-bearingformation,5.7×10-9inthetuffaceoussandstoneand1.4-1.5×109inthebasalt.AuisassociatedwithTe,Se,Ni,Cu.Au=74.331×Te+0.0335×Ni-0.0211×Cu-2.650.Geochemicalinvestigationsrevealedthatthemineralizingmaterialscamefromthebasaltandtuffaceoussandstoneinthegold-bearingformation.Undertheactionofductilebrittleshearstructure,thegold-bearingformationwasmetamorphosedandaltered,andtheore-formingmaterialsactivated,migratedandmineralized.Themineralizingfluidshowsthreemineralizingstages,withthecharacteristicsofmiddletolowtemperature(381-115℃)andmiddletolowmassfractionsofNaCl(2.18%-16.77%).ThefluidisoftheCa2+-Mg2+-Na+-Cl-typeandH2O-NaClsystem.Accordingtothedatafromhydrogenandoxygenisotopiccomposition(δD=-114.6‰--68.8‰,δ18OH2O=-2.47‰-5.91‰),theconclusioncanbedrawnthatthemineralizingfluidoftheHongshijinggolddepositwasakindofmixedhydrothermalsolutioncomposedmainlyofmeteoricwater,magmaticwaterandformationwaterinbas

简介：ThecharactersoforganicmatterinrocksandoresintheFankouandDabaoshandepositsaresystematicallystudiedwithregardtotheirimplicationsformineralization.TheresultsshowthatkerogensinthisareafaaamainlyintotheplutonismfieldinVanKrevelen'sdiagram.Reflectivityoftheorganicsubstancewasmeasuredtobe3.06%(Fankou)and1.67%(Dabaoshan),correspondingtothepaleo-geotemperaturesof232℃and184℃respectively.Thesametypesofporphyrinsandhydrocarbonswererecognizedintherocksandoresandhydrocarbon-bearinginclusionsarewidespreadinquartzandcalcite,particularlyinDabaoshan,Itisthoughtthattheorgainmattermusthaveplayedacriticalroleindiagenesisandmetallizationinthesedepositsandthatthehydrothermalsolutionwasmostlikelytobethetypeofwater-oilhotbrine.

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